Signaling device.



E. MOARD; SIGNALING DEVICE. APPLICATION mm 5.6. 913.

Patented Oct. 31,1916.

In ventor M a M E.

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is produced through a diaphragm that s.

v ticularly useful for member pro ecting-there ERIC ivioann, or EAST HAMPTON, .coiunneriour, 'nssienon fro evin" BROTHERS MANUFACTURING COMPANY, OF

nes'r HAMPTON, CONNEGTICUT,- A CORPORA- TION .OF CONNECTICUT.. r

. SIGNALING DEVICE.

Specification of Letters Patent.

Patented Oct. 31, 1916.

Application filed February 6, 1913. Serial No. 746,526.

T0 all whom it may concern:

.Be it known'that I, ERIC MOARD, a of the United States, and a resident of East Hampton, in the county of Middlesex and State of Connecticut, have invented certain new and useful lmprovements in Signaling Devices, of which the following is a tull, clear, and exact description, whereby any one skilled in the art may make and use the same. I I V The invention relates to signaling de- "horns or. alarms wherein the sound mechanically agitated.

It relates .more particularly to the type of .signaling device which might well be designated va motor horn, that is,a device in which a diaphragm is vibrated at high velocity and with sutficient amplitude to produce sounds of great intensity and carrying power.

Devices embodying the invention are parautomobiles, launches, boats of various characters or might be used for tog signals or in tact wherever a sig naling device is desirable.

The invention herein defined is an improvement upon the general form of motor' horn such as has been commonly employed and wherein a motor with a cam has acted directly upon. the diaphragm or a contact from;

The .objectot the inventionis to produce a signaling device embodying a diaphragm which willgivea clear sound of great intensity and carrying power due to rapid vibrations of the diaphragm.

A iurther object is to provide a simple means for preventing the sticking or holding of the cam and appurtenantparts for. producing the vibrations.- V

A till further object is to provide a simplemechanism for permitting an easy starting movement of the motor even though its cam may belrcsting against one or more of the contacting membersot the diaphragm. .Reterring'to the drawings; Figure l is a, central vertical section through the horn casing and diaphragm, the motor being shown in full lines. Fig. 2 is a .crosssectional view of the casing just in advance of thearmature shaft and its cam, illustrating 'the improved form of contact member for vibrating the diaphra m. Fig. 3 is .a

siixxi'lar v z 'iefw shearing a .elightly modified citizen tact member of together.

and. the motor .2

arrangement of contact member. Fig. 4 is a perspective view of the cam with the con- Fig. 2 illustrated in dotted lines infladva-nce thereof.

It has become common practice to use a inotor, especially a small electric motor for i actuating he diaphragm of a signaling device. The vibration t the diaphragm is ordinarily effected by utilizing a cam upon the motor shaft which during the rotation of said shaft, .strik'es against a contact member intimately associated with the diaphragm. "The arrangement is such that the diaphragm is fiexed in one direction and due to the torm of the cam is quickly released and vibrates. happens "in such devices, particularly where electric motors .ot small capacity and low voltage are employed that the cam becomes locked with referenceto the, Contact member of the diaphragm and ture is started and a fsuifi ient-torque is secured, the parts will remain locked or frozen This necessitates tinkering with the mechan'i'smand also necessitates the most delicate adjustment between the cam' and the contact members of the diaphragm.

It is one ot the principal objects of the present invent on to-so arrange the cam and contact parts intermediate said cam an diaphragm that they will automatically relieve eaci other in the event of the cam coming to rest with its striking tooth directly against the protuberance of the contact member. At the same time,.the a'rtrangement "is one which permits of very 1 denotes the casing within which is mounted the motor v2, which is provided with an extended armature shaft ,3 .at the .end o't whichisarranged a cam plate 4 which as illustrated,l'haslcam p ejections .5 upon its face. .The casing 1 isfarranged to slip over the neck 6 of adiaphragm-casing 7 is slipped into a reduced section 8 where it is clamped in anyjde siredaposition bya set screw 9. The adjustment of the motor along the member '8 of course determines the position of the cam plate 4 with referenceto the diaphragm and its contact membera until the arma- I It ,not inirequentlyv the minute and fine adjust has ordinarilybeen employed sition of The diaphragm 10 is securely clamped between the diaphragm casing 7 and a casing member 11, the latter having an annular flange 12 which over-lies the edge of the casing 7 and thoroughly incloses the parts. The casing 11 has an extended neck 13 over which is slipped the inner end 14: of the horn or resonator casin 15. Suitably arranged across the face of the diaphragm 10 is a bar 16 which, as illustrated in Fig. 2, extends completely across the diaphragm and as illustrated in Fig. 3, extends part-way across the diaphragm. Its function and purpose is the same in either case and it is provided with a contact button 17, which rests between it and the center of the diaphragm and serves as a pivot for an oscillatory member 18. This oscillatory member 18 is free to move with reference to the bar 16 except as it is restrained by a light spring 19. The oscillatory member 18 as illustrated in Fig. 2 may have one or more protuberances extending inward toward the face of the cam plate 4. As illustrated in Fig. 2, there are three of these protuberances 20, 21 and 22, although the number and arrangement of the protuberances is not an essential of the invention. These protuberances 20 to 22 inclusive, are formed by pressing up the substance of the metal of the oscillatory member 18 and they provide the striking points or contact points against which the cam projections 5 of the cam plate 4 contact during the rapid rotation of the armature shaft.

Ordinarily the oscillatory plate 18 is held in the position illustrated in Fig. 2 by a light spring 19. It is obvious that with the cam plate 4 centrally arranged and in line with the pivot of the plate 18 that the cam projections 5 will strike against the projections 20 to 22 inclusive, forcing the plate 18 and bar 16 inward to cause a vibration of the diaphragm 10. Of course, during the rapid rotation of the cam plate 4, the plate 18 will be constantly vibrated against the tension of the spring 19 and said plate 18 may be in a condition of rapid oscillation.

Whenever the cam plate 4 comes to a porest with its cam projections 5 just 1n engagement with the protuberances 20 to 22 inclusive, the parts would be ordinarily fairly locked together and obviously, it would take considerable power to rotate the armature shaft if the plate 18 were fixed and provided, of course, there was not the most delicate adjustment for release between the cam projections and the protuberances of the oscillatory plate. With the arrangement shown, however, and the light spring tending to hold the plate 18 in a given position, a very slight pull of the armature is sufficient to give a partial rotation to the cam, the plate 18 oscillating therewith. Obviously, as soon as the armature shaft is well started, its torque will increase to the maximum and there will be no freezing between the cam projections and the protuberances which form the contacts for the diaphragm.

In Fig. 3, the oscillatory plate 20 is illus trated as having and 22 and a further resilient spring 23 is interposed between the plate 20 and the supporting arm 24. The purpose and function of the structure as illustrated in Fig. 3 is identical with that illustrated in Fig. 2, the illustration merely indicating that it was not absolutely essential that the sup porting member or bar be carried entirely across the diaphragm and it is not necessary to have three protuberances or contact points as illustrated in Fig. 2. It is apparent that the form and arrangement of the parts might be varied to suit the exigencies of any particular case, the main purpose being to provide a striking mechanism consisting of an oscillatory member bearing protuberances which constitute the contact members cooperating with a rotary cam for vibrating the diaphragm.

Attention is also called to the arrangement in which the bar 16 or 24 is securely and firmly held in the casing and projects out over the surface of the diaphragm so that the vibrations of said member will be transmitted to the diaphragm and these occurring with great rapidity give a tone of great intensity.

Obviously, the detail of the construction and arrangement of parts might be varied to a great extent without departing from the spirit or intent of the invention, which contemplates a means for preventing the locking or freezing of the rotary cam member with reference to the contact members.

What I claim as my invention and desire to secure by Letters Patent is:

In a signaling device in combination, a rotary shaft, a diaphragm, means for applying the power of said shaft to agitate said diaphragm, said means including an agitating member rotated by said shaft, and a transmitting device interposed between said member and the diaphragm, said transmittlng devlce having a partlal for resisting the rotary movement thereof.

A signaling device embodying a diaphragm, a motor and a cam, a vibratory member arranged to vibrate said diaphragm, said member bearing an oscillatory plate adapted to be struck by the cam and resilient means intermediate said plate and vibratory member.

3. A signaling device embodying a diaphragm, a motor, a cam rotated by said motor and arranged in a plane parallel with the diaphragm and a vibratory contact member embodying a support extending over the face of the diaphragm and bearing an oscillatory plate adapted to be struck by but two protuberances 21 1,203,544- i i g I 3 the cam and resilient means intermediate said plate and its support.

4:. A signaling device embodying a diaphragm, a motor and a cam rotated thereby with a supporting bar over-lying the faceof the diaphragm, an oscillatory striker plate pivoted to the supporting bar and resilient means for normally holding said plate in predetermined position.

5. In a device of the character described, a diaphragm, a rotary shaft, means for applying the power of said shaft to agitate the diaphragm, said means including a cam plate rotated by and with said shaft, and an oscillatory pivoted plate moving in a plane parallel with the diaphragm and intermediate the cam plate and diaphragm, said plate having a relative rotation with reference to thecam plate, contact protuberances extending from said plate and engaged by the cam 7 plate, and a resilientconnection for normally holding, the pivoted plate against rotation and returning 'it to normal position after partial rotation by the cam plate.

6. In a device ofthe character described, a diaphragm, a rotary shaft'and a cam actuated thereby and having their central axes at right angles to the'diaphragm adapted to agitate said diaphragm, a transmitting member pivoted intermediate the diaphragm'and cam, in a plane parallel with the diaphragm and cam and adapted to have partial rotary movement in the same direction with the cam, resilient means for holding said member in normal position against rotation with the cam and contact protuberances extend ing from said transmitting member adapted to be engaged by the cam during its rotation for agitating the diaphragm.

7. In a device ofthe character deScribed a diaphragm, a rotary shaft at right angles thereto, a cam actuated thereby, a vibratory member adapted to be actuated by the cam for agitating. the diaphragm, said member interposed between the diaphragm and cam and having a rotary movement ma plane parallel with the diaphragmand cam anda r 4 relative rotary movement with reference to the cam, and resilient means for normally holding said member against rotation by the cam;

8. In a device of the character described, a diaphragm, a rotary shaft, means for applying the power of said shaft to agitate" the diaphragm, said means including a cam plate having cam surfaces and rotated by the shaft, a resiliently held rotary member having protuberances normally engaging the cams of. the cam plate, said member arranged intermediate the cam and diaphragm and adapted to rotate with said cam and to move relatively thereto, saidresilient meansnormally tending to hold the said member against rotation. v V g 9. In a signaling device having a rotary shaft, a diaphragm and an agitating cam plate for the diaphragm driven by theshaft,

said cam plate having high and low cam points, an oscillatory plate, pivoted intermediate the cam plate anddiaphragm and provided with protuberances normally engaging the low points of the camv plate and adapted asthey ride over the high points of the cam plate during rotation of said plateto fieX the diaphragm and resilient connections for said plate permitting said plate to partially rotate with the cam and nor- ,mally acting to rotate said plate in a reverse direction from that induced by the cam.

Witnesses MAY, 8. PURPLE, CLARA E. *DIoKsoN.

Copies of this patent may be obtained for five eentseach, by addressing the Qommissioner of Patents,

Washington, DIG. a

ERIC MOARD; 

